HYT Science and Technology Co TC-620U2 Two-way Radio User Manual TC 620 owner s manual
Shenzhen HYT Science &Technology; Co Ltd Two-way Radio TC 620 owner s manual
Contents
- 1. Service Manual
- 2. Users Manual
Users Manual
TC-620 Owner’s Manual
1
Contents
Introduction ................................................................................................................................2
Safety and General Information ................................................................................................. 3
Specifications ............................................................................................................................. 4
Product Inspection...................................................................................................................... 5
Getting Started ........................................................................................................................... 7
Battery Information..................................................................................................................... 9
Antenna Information ................................................................................................................. 12
Assembly and Disassembly ..................................................................................................... 12
General Radio Operations........................................................................................................ 17
Functions and Settings............................................................................................................. 20
CTCSS/CDCSS ................................................................................................................ 20
Battery Save ..................................................................................................................... 20
Power Adjust ..................................................................................................................... 20
Time-out Timer (TOT)........................................................................................................ 21
Battery Strength Indicator.................................................................................................. 21
Monitor / Squelch Off ........................................................................................................ 21
Scan.................................................................................................................................. 22
Busy Channel Lockout (BCL)............................................................................................ 24
Low Battery Alert............................................................................................................... 24
Voice Operated Transmit (VOX)........................................................................................ 24
Troubleshooting ....................................................................................................................... 26
Care and Cleaning ................................................................................................................... 27
Optional Accessory .................................................................................................................. 28
Channel Frequency Table ........................................................................................................ 30
CTCSS Table (38).................................................................................................................... 30
CDCSS Table (83) ................................................................................................................... 31
Glossary ................................................................................................................................... 33
TC-620 Owner’s Manual
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Introduction
Thank you for your purchase of the HYT TC-620 radio - the choice for professionals. TC-620 is
a professional radio that with exquisite and ergonomic design, which bring user a fine operation
feel. The TC-620 is customized for logistics, warehousing, property management and service
industries because all TC-620 radios are approved to dust & water protection Class IP54 and
endowed with large speaker.
This easy-to-use radio will deliver you secure, instant and reliable communications at peak
efficiency. Please read this manual carefully before use. The information presented herein will
help you to derive maximum performance from your radio.
MODELS COVERED IN THIS MANUAL
TC-620 VHF Two-way Radio
TC-620 UHF Two-way Radio
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Safety and General Information
The following general safety precautions as would normally apply, which should be
observed during all phases of operation, service and repair of this equipment.
◇ Turn off your radio prior to entering any area with a potentially explosive atmosphere.
◇ Do not charge your battery in a potentially explosive atmosphere.
◇ Do not use any portable radio that has a damaged antenna. If a damaged antenna
comes into contact with your skin, a minor burn can result.
◇ This equipment should be serviced by qualified technicians only.
◇ To avoid possible interference with blasting operations, turn off your radio when you are
near electrical blasting caps. In a blasting area or in areas such as hospital site posted
“Turn off two-way radio”; when taking an airplane, please obey the “turn off two-way
radio” instruction of aircrew staff as well.
◇ For vehicles with an air bag, do not place a radio in the area over an air bag or in the air
bag deployment area. Air bags inflate with great force. If a radio is placed in the air bag
deployment area and the air bag inflates, the radio may be propelled with great force
and cause serious injury to occupants of the vehicle.
◇ Do not expose the radio to direct sunlight over a long time, nor place it close to heating
source.
◇ When using your radio, hold the radio in a vertical position with the microphone 3 to 4
centimeters away from your lips.
◇ If you wear a radio on your body when transmitting, ensure the radio and its antenna
are at least 2.5cm away from your body.
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Specifications
General
Frequency Range（MHz） VHF: 136-174MHz
UHF (1): 400-420MHz
UHF (2): 450-470MHz
UHF (3): 440-470MHz
Channel Spacing（KHz） Wide: 25 KHz / Narrow: 12.5KHz
Operating Voltage（V） 7.5V DC
Antenna Impedance (Ω) 50Ω
VOX Level Adjustable 5 levels
Operating Temperature -20℃- +50℃
Reliability Meets GB/T15844-1995 Standard
RF Power Output（W） Hi: 4.5-5W / Lo: 2.0±0.3W
Audio Distortion Less than 5%
Reference Sensitivity (dBm) Wide: -119dBm /Narrow: -118dBm
Maximum Audio Power Output (W) More than 1.2W
TC-620 Owner’s Manual
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Product Inspection
Before unpacking the TC-620 portable radio, please inspect the packaging for signs of damage
and report any damage to your dealer.
Upon unpacking of the TC-620 portable radio, please ensure that all items shipped were
received, report any missing or damaged items to your dealer.
Item Qty. (PCS)
Antenna 1
Belt Clip 1
Screw 2
Strap 1
Battery 1
Charger 1
Adapter 1
Owner’s Manual 1
Note: 1. Frequency band is marked on the label of antenna, if not, identify the frequency band
according to the color circle, red indicates UHF, green indicates VHF. Please refer to the label
on the radio unit for detailed frequency band information.
2. The radio unit is shipped with screws mounted from the factory.
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Battery Adapter
Belt Clip Charger
Strap Screw
Antenna
TC-620 Owner’s Manual
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Getting Started
1
2
4
5
10
6 7 8 9
12
13
14
11
3
16
15
(1) PTT (Push-to-Talk)
key
(2) SK1 key (Side Key 1)
(programmable)
(3) SK2 (Side Key 2)
(programmable)
(4) Speaker
(5) Microphone (6) Antenna (7) LED Indicator (8) Channel Selector Knob
(9) Radio On-Off
/Volume Control Knob
(10) Battery Latch (11) Accessory Jack (12) Accessory cover
(13) Belt Clip (14) Battery (15) Screw (16) Electrode Piece
* PTT (Push-to-Talk) Key
Press and hold down the PTT key to transmit, release it to receive.
*SK1 (Side Key 1)
Side Key 1 is the programmable key that can be assigned with long press function and short
TC-620 Owner’s Manual
8
press function by your dealer. See Glossary for definitions of short press and long press.)
*SK2 (Side Key 2)
Side Key 2 is the programmable key that can be assigned with long press function and short
press function by your dealer. (See Glossary for definitions of short press and long press.)
*LED indicator
Status of LED indicator and alert tone see table below (See Functions and Settings for the
detailed operations):
Power up in user mode
When the radio is turned on, the power up alert tone
is heard.
When the current channel is a blank channel, the
radio sounds Beep tone continuously.
Low battery alert
LED flashes red, and a low-pitched tone sounds at
intervals of 10 seconds.
Transmitting
LED glows red when transmitting
When TOT timer expires, the radio sounds Beep tone
continuously.
TOT pre-alert: a Beep is heard.
Receiving LED glows green when carrier is present.
Scanning
Green LED flashes at every 1 second, while scanning
is in process.
Scan Start Alert Tone (programmable by your dealer):
a Beep is heard.
Scan Exit Alert Tone (programmable by your dealer):
a Beep is heard.
Priority Channel Scan Alert Tone (programmable by
your dealer): when scanning, if the current channel is
the priority channel, the radio sounds a Beep.
Power adjust
A low-pitched tone is heard when transmit power is
adjusted from high power to low power.
TC-620 Owner’s Manual
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A high-pitched tone is heard when transmit power is
adjusted from low power to high power.
VOX
A high-pitched tone is heard when the VOX feature is
activated.
A low-pitched tone is heard when the VOX feature is
disabled.
*Channel Selector Knob
Rotate the knob to select from channel 1 to 16.
* Radio On-Off/Volume Control Knob
Rotate the knob clockwise to turn the radio on, rotate the knob fully counter-clockwise until a
“click” is heard to turn the radio off.
Turn the knob clockwise to increase the volume, or counter-clockwise to decrease the
volume.
*Battery latch, used to remove the battery.
* Accessory Jack
The jack is used to connect speaker, microphone, external PTT, earpiece, programming
cable and cloning cable.
Battery Information
Safety Precautions
The optional battery is shipped uncharged from the factory. Please charge a new battery or
battery that has not been used for a long time prior to use. The maximum capacity of the battery
is achieved only after 2 or 3 charging and discharging cycles. When the battery power runs low,
please recharge the battery or replace with a refresh one.
Applicable Battery Packs
To reduce the risk of injury, charge only the battery specified by the manufacturer. Other
batteries may burst, causing bodily injury and damage.
Caution:
1. Do not short circuit the battery terminals or discard the battery in fire. Never attempt to
TC-620 Owner’s Manual
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disassemble the battery.
2. The battery should be charged at 5 ~ 40 , temperature out of this range could result the ℃℃
battery not fully charged.
3. When charging a battery attached to a radio, turn the radio off to ensure a full charge.
4. Do not cut off the power supply or remove the battery when charging a battery.
5. If the operation time will not increase even though the battery is properly charged, this
means the battery life cycle is over, please replace with a new one.
6. Do not return fully charged batteries to the charger for an “extra boost”. This action will
significantly reduce battery life.
7. Never charge a battery that is wet. Please dry it with soft cloth prior to charge.
All batteries can cause property damage and/or bodily injury such as burns if a conductive
material such as jewelry, keys, or beaded chains touch exposed terminals. The conductive
material may complete an electrical circuit (short circuit) and become quite hot. Exercise care in
handling any charged battery, particularly when placing it inside a pocket, purse, or other
container with metal objects.
Charging Operation
If the battery is assembled to the radio, its LED indicator flashes red and sounds falling tone 10
seconds per time, which indicates that the battery power is low and please charge the battery by
the HYT approved charger. The charger’s LED indicates the charging progress.
Status Charger LED Remarks
Standby (no-load) Red LED flashes slowly (0.2s on/3s off ) Intelligent rapid-rate
charger only
Battery is charging Red LED solidly glows
Battery is fully
charged
Green LED solidly glows
Error Red LED flashes rapidly (0.2s on/0.2s
off)
Intelligent rapid-rate
charger only
Charging please refer to the following procedure:
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1. Plug the DC connector of the adapter into the DC socket on the back of the charger.
2. Place the radio with the battery attached, or the battery alone, in the charger.
3. Plug the AC connector of the adapter into the AC outlet socket.
4. Make sure the battery is in well contact with the charging terminals, the charging process
initiates when the red LED lights.
5. The greed LED lights about 3 hours later indicating the battery is fully charged. Then remove
the radio with the battery attached or the battery alone from the charger.
Note:
a) It is normal that the LED flashes before placing the battery into the charger.
b) Do not place another battery into the charger until the charger LED is stabilized.
c) After the battery is placed properly, the LED solidly glows red indicating the battery is
charging, or flashes indicating the battery is damaged or the ambient temperature is
over high/low.
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Antenna Information
Stubby antennas are ideal for communication within limited range. Fine and long
antennas optimizes communication coverage, ideal when the radio is worn on the belt
because they are flexible and soft.
Rainy days or forest locations may narrow your communication range, please prepare
in advance to avoid potential inconvenience.
Assembly and Disassembly
Attaching the Battery
1. Hold the battery and make it attached close to the top of aluminum chassis, see figure 1.
(Note: insert the tab on the top of battery into the top of battery slot).
Figure 1
2. Lightly press the bottom of the battery until a “click” is heard. By then, the battery latch locks
with the main unit and assembly is finished. See figure 2 below:
Note: if the battery is not well locked, please remove the battery and attach it again.
TC-620 Owner’s Manual
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Figure 2
Removing the Battery
1. Please turn off the radio first. Then hold the top of radio main unit and press belt clip to
make its tail turn up. Lift the battery latch in the direction of the arrow. See figure 3.
Figure 3
2. When the bottom of battery is turned up, release the battery latch and take out from the
battery slot, see figure 4 below. (Note: when battery is turned up, the angle between battery
and main unit can not be too large to cause serious abrasion of the tab in the top of
battery.)
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Figure 4
Attaching the Antenna
1. Insert the antenna to the big screw thread hole on the top of main unit.
2. Turn the antenna clockwise until it is screwed down, shown as figure 5.
Figure 5
Removing the Antenna
When disassembling antenna, turn the antenna counter-clockwise until it is loosen and screwed
out, shown as figure 6.
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Figure 6
Attaching the Belt Clip
Loose the screw of belt clip from the main unit, fasten the belt clip to the main unit (make sure
the screw holes of belt clip and of aluminum chassis is aligned), clockwise screw down the belt
clip. (See figure 7 below).
Figure 7
Removing the Belt Clip
Turn the screwdriver counter-clockwise to loosen the screw. Please refer to the operations for
attaching the belt clip. See figure 8 below.
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Figure 8
Attaching the Earpiece/Microphone
1. Open (not remove) the accessory cover, shown as figure 9:
Figure 9
2. Plug the audio accessory firmly into the accessory jack, then secure the screw, shown as
figure 10.
TC-620 Owner’s Manual
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Figure 10
Removing the Earpiece/Microphone
Loosen the screw and then remove the audio accessories.
Note: Using the radio with audio accessory may affect the waterproof performance of the radio.
General Radio Operations
Note: See Glossary for definitions of relevant words.
Turn the Radio On/Off
Turn the radio on-off /volume control knob clockwise to turn on the radio, then radio sounds an
alert tone. Turn the radio on-off /volume control knob counter-clockwise to turn off the radio.
(See figure 1 below)
Figure 1
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Adjust the Volume
Press the programmable key set as Squelch Off / Squelch Off Momentary to listen the
background noise, then turn the volume control knob clockwise/counter-clockwise to
increase/decrease the volume. See Glossary for definition of Squelch.
Figure 2
Select a Channel
Turn the channel selector knob to select a channel. See figure 3 below.
Figure 3
Transmitting
To transmit, press and hold down PTT key and talk to microphone to speak. Ensure the radio is
2.5 to 5 centimeters away from your lips.
TC-620 Owner’s Manual
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Receiving
To receive signal, release the PTT key.
Talk Range:
Flat ground with no obstructions Up to 10 kilometers
Residential area (close to buildings） Up to 5 kilometers
Inside multi-level buildings Up to 20 floors
Programmable Auxiliary Functions
Your dealer may program the TK, SK1, SK2 (long or short press) keys with one of the following
auxiliary functions respectively. See Functions and Settings for the detailed description.
z None
z Power Adjust
z Battery Power Indicator
z Squelch Off (See Glossary for definitioins of Steady and Squelch Off.）
z Squelch Off Momentary
z Monitor
z Monitor Momentary（See Glossary for definitioins of Momentary and Monitor）
z Scan（See Glossary for definitioin of Scan.）
z VOX
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Functions and Settings
The following functions are programmable by your dealer.
CTCSS/CDCSS
Set up talkgroups with unique CDCSS/CTCSS to prevent unwanted conversations on the same
frequency. See Glossary for definitions of CTCSS and CDCSS.
If CTCSS/CDCSS is set on the current channel, CTCSS/CDCSS match is required for the radio
to unmute to an incoming signal. If CTCSS/CCSS is not set, the radio can receive calls from all
users operating on the same frequency. Your dealer may set CTCSS/CDCSS for some
channels.
This feature does not mean that your conversation will not be heard by others. Radios that set
with the same CTCSS/CDCSS, or no CTCSS/CDCSS, can receive from you.
Battery Save
This feature can be enabled by your dealer. The Battery Save feature is automatically activated
once no activity on the channel and no operation performed (no key press and no knob
selection), for extended operation time.
Pressing any key or receiving a signal will restore the radio to normal operation and exit from
Battery Save.
See Glossary for the definition of Battery Save.
Power Adjust
A press of the programmed Power Adjust key switches the transmit power level between high
and low power.
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Time-out Timer (TOT)
Limits the amount of time the radio user can continuously transmit on a channel. If the user
holds down the PTT longer than the preprogrammed limit, the radio automatically stops
transmitting, and generates a warning tone until the PTT is released.
Your dealer may program the alert tone that sounds before the TOT timer nearly expires.
See Glossary for the definition of Time-out Timer.
Battery Strength Indicator
The TC-620 allows you to simply press one button to illuminate the LED batter gauge, which
emits different indications representing battery strength levels until the key is released.
Battery Strength LED Indication
70% - 100% Green
50% - 70% Orange
30% - 50% Red
10% - 30% LED is unlit when the programmed key is pressed, while flashes
red while the radio is operating.
Less than 10% LED is unlit when the programmed key is pressed. While the
radio standby, LED flashes red and a low-pitched tone sounds at
intervals of ten seconds, a press of the PTT then shall activate
the talk prohibit tone.
Monitor / Squelch Off
z Squelch Off
Causes the radio to forcibly unmute speaker to here activities on the current channel, whatever
the receive condition is. The radio speaker outputs audio when audio signal is present, or
background noise will be heard if no audio signal is detected.
TC-620 Owner’s Manual
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Press the function key to enter the Squelch Off mode, and press it again to exit.
z Squelch Off Momentary
Causes the radio to forcibly unmute speaker to here activities on the current channel, whatever
the receive condition is. The radio speaker outputs audio when audio signal is present, or
background noise will be heard if no audio signal is detected.
Holds down the function key to enter the Squelch Off mode, and release it to exit.
z Monitor
Carrier condition must be satisfied for the radio to unmute to an incoming call, regardless of
CTCSS/CDCSS condition.
Press the function key to enter Monitor mode, and press it again to exit.
z Monitor Momentary
Carrier condition must be satisfied for the radio to unmute to an incoming call, regardless of
CTCSS/CDCSS condition.
Holds down the function key to enter Monitor Momentary mode, and release it to exit.
Scan
Press the programmed Scan key to initiate scanning ascending through the channel numbers in
scan list. Green LED flashes during the scan process, and solidly glows when activity is
detected on a channel and signalling condition is satisfied. Press the key again to exit scanning.
When scanning is active, the radio continuously scans for activity on scan list members. Once
activity is detected on a channel, scanning pauses on the active channel for you to receive
activity. Your dealer can choose channels that you wish to scan and list them in a scan list.
No Priority Channel
Assuming a scan list with 6 channels, if all the channels are non-prioritized, the normal scan
operation would check for activity in the following sequence :
TC-620 Owner’s Manual
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Priority Channel Scan
If you prioritize Channel 2 as Priority 1, the scan operation would change to
Scan On/Off
You can enter scan mode through the following two methods:
1. Key operation
Press the programmed Scan key to enter scan mode, provided that there’re no less than 2
members in the scan list.
2. Auto
When Auto Scan is enabled for a channel, the radio shall automatically enter scan mode when it
is switched to the channel.
You can exit scan mode through the following three methods:
1. Key operation
TC-620 Owner’s Manual
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Press the programmed Scan key to exit scan mode.
2. Auto
The radio automatically exits from scan mode when it is switched to another channel.
1. Key operation
Press the programmed Scan key to exit from scan mode.
2. Auto
The radio automatically exits from scan mode when it is switched to another channel.
3. Turn the radio off.
z Talk Back
You can respond to any calls received during the scan process by pressing the PTT.
z Priority Channel Scan
Enable you to constantly monitor & keep an update on the activities on the most commonly used
channel so that messages will not be missed. Check with your dealer for details.
When scanning remains on a non-priority channel, the radio continues to monitor activities on
the priority channel, and jumps to the priority channel if activity is detected.
Busy Channel Lockout (BCL)
Avoid interference with the users using the same channel by preventing transmission if another
talk group is already on the air. The radio will generate a continuous tone upon PTT press if a
transmission is not allowed. Release the PTT to cancel the tone.
See Glossary for definition of BCL.
Low Battery Alert
For extra convenience, LED flashes red and a low-pitched tone sounds at every ten seconds to
alert users to recharge the battery should the battery level run low.
Voice Operated Transmit (VOX)
You can transmit hands free with the use of optional accessories. The radio will automatically
begin transmitting when you speak, and terminate transmitting when you stop talking. See
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Glossary for definition of VOX.
Press the programmed VOX key to activate or exit the VOX feature, with alert tone sounds
accordingly.
Your dealer can enable/disable the VOX feature, and set the VOX sensitivity. When VOX
feature is enabled, the user can transmit hands free with VOX accessories:
1. Press the programmed VOX key to activate the VOX feature.
2. Select the PTT/VOX switch on the earpiece to VOX.
3. Plug the earpiece into the accessory jack.
4. Speaker into the earpiece microphone and your voice will be transmitted.
When transmitting with VOX accessories, you may here your own voice from the VOX earpiece
slightly. Press the PTT of your radio to disable the VOX feature. Turn the radio off on again, or
plug the earpiece into the accessory jack again to restore the VOX feature.
Note: No matter whether the VOX feature is enabled, if you select the PTT/VOX switch on the
earpiece to PTT, you are able to transmit by press of the external PTT, and you are not allowed
to push the switch from PTT to VOX, this action shall cause the radio to continuously transmit.
When continuous transmission occurs, push the PTT/VOX switch from VOX to PTT, or turn on
the radio again to restore the radio to operation use.
Note: to order accessories, please contact your dealer.
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Troubleshooting
Symptom Solution
Cannot power on the radio.
a. The battery is run out. Please recharge the battery
or replace it with a fresh one.
b. The battery is not properly installed. Please
remove and reinstall the battery.
The operation time will not increase
even though the battery is properly
charged.
a. The battery life cycle is over, please replace with a
new one.
b. The battery is not fully charged. Make sure that the
battery is removed after LED indicator has indicated
green.
Cannot talk to or hear group
members.
a. Confirm radios have the same channel, and
CTCSS/CDCSS settings.
b. Make sure you are within their communication
range.
Hear non-group members a. Please change your CTCSS/CDCSS settings, and
so as your group members.
No voice or low voice while
transmitting
a. Whether the volume switch knob is switched to a
proper position
b. Send the radio to your dealer for microphone
detection
Noise always on a. Group members are too far away to receive their
call. Please go within the communication range and
re-power on the radio to try.
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Care and Cleaning
z Do not handle the radio by its antenna or external microphone directly.
z Do not place the repeater in a dusty or dirty environment.
z Clean the radio with a lint-free cloth to remove dirt or grease, to avoid poor contact due to
excessive dust.
z Clean the radio using a lint-free cloth moistened with clean water and a mild dishwashing
liquid.
z Avoid subjecting the radio to corrosives, solvents or spirits.
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Optional Accessory
Ni-MH Battery (1300mAh) BH1303 Multi-unit Rapid-rate Charger
MCA02
Switching Power PS7501 (for
use with different power cords
for different countries and
areas)
Remote Speaker Microphone
SM08M3
Receive-only Earpiece (for use with
remote speaker microphone)
ESS07
Receive-only Earpiece with
Transparent Acoustic Tube
(for use with remote speaker
microphone) ESS08
Earbud with in-Line PTT &
VOX ESM11
Earpiece with in-Line PTT &
VOX & Transparent Acoustic
Tube EAM11
Earpiece with on-MIC PTT & VOX
& Transparent Acoustic Tube
EAM12
D-earset with in-Line
Microphone & PTT & VOX
EHM15
D-earset with Boom
Microphone & in-Line PTT &
VOX EHM16
Light-weight, Single-Muff
Headset with in-Line PTT & VOX
ECM12
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Light-weight, Behind-the-Head
Earpiece with in-Line PTT & VOX
ECM11
Heavy Duty Noise-cancelling
Headset (with screw) ECM13
Behind-the-Head,
Noise-Cancelling Headset
(with screw) ECM14
Antenna
Programming Cable (COM port)
PC19
Leather Carrying Case
LCBN56
Transparent Waterproof Bag
LCBY03
Universal Chest Pack LCBN13
Programming Cable (USB port)
PC26
Universal Programming kit
PC08
Cloning Cable CP05
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Channel Frequency Table
Model:
Serial No.:
Channel
Tx
Frequency
(MHz)
Tx CTCSS
/CDCSS
Rx
Frequency
(MHz)
Rx
CTCSS/CDCSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CTCSS Table (38)
No. Frequency (Hz) No. Frequency (Hz)
1 67.0 20 131.8
2 71.9 21 136.5
3 74.4 22 141.3
4 77.0 23 146.2
5 79.7 24 151.4
6 82.5 25 156.7
7 85.4 26 162.2
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8 88.5 27 167.9
9 91.5 28 173.8
10 94.8 29 179.9
11 97.4 30 186.2
12 100.0 31 192.8
13 103.5 32 203.5
14 107.2 33 210.7
15 110.9 34 218.1
16 114.8 35 225.7
17 118.8 36 233.6
18 123.0 37 241.8
19 127.3 38 250.3
CDCSS Table (83)
No. CDCSS No. CDCSS
39 023 82 331
40 025 83 343
41 026 84 346
42 031 85 351
43 032 86 364
44 043 87 365
45 047 88 371
46 051 89 411
47 054 90 412
48 065 91 413
49 071 92 423
50 072 93 431
51 073 94 432
52 074 95 445
53 114 96 464
54 115 97 465
55 116 98 466
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56 125 99 503
57 131 100 506
58 132 101 516
59 134 102 532
60 143 103 546
61 152 104 565
62 155 105 606
63 156 106 612
64 162 107 624
65 165 108 627
66 172 109 631
67 174 110 632
68 205 111 654
69 223 112 662
70 226 113 664
71 243 114 703
72 244 115 712
73 245 116 723
74 251 117 731
75 261 118 732
76 263 119 734
77 265 120 743
78 271 121 754
79 306
80 311
81 315
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Glossary
Name Description
Short Press Key press shorter than 1.5 seconds.
Long Press Key press longer than 1.5 seconds.
Standby Status
In normal mode, no key operation is made on the
radio and the radio is in receiving status.
CTCSS/CDCSS
The setting of CTCSS/CDCSS code in transmitting
party must match that in the receiving party, for the
receiver to unmute its speaker to output audio.
Battery Save
The function is to save the battery power and
prolong the operation time. Once no activity on the
channel and no operation performed, the radio shall
be on and off alternately.
Time-out Timer (TOT)
The time-out timer feature stops someone from
talking too long and tying up the channel.
Squelch
The purpose of squelch is to mute audio output
from the speaker when no signals are present.
Open the squelch to unmute radio speaker.
Squelch Off
Always unmute speaker to receive audio as well as
background noise.
Monitor
Carrier condition must be satisfied for the radio to
unmute to an incoming call, regardless of
CTCSS/CDCSS condition.
Momentary
Holds down the function key to activate the status,
and release it to exit.
Steady
Press the function key to activate the status, and
press it again to exit.
Scan The scan feature enables the radio to continuously
TC-620 Owner’s Manual
34
scan each channel for activity.
Busy Channel Lockout
Avoid interference with the users using the same
channel by preventing transmission if another talk
group is already on the air.
VOX
The radio will automatically begin transmitting when
you speak.
HYT endeavors to achieve the accuracy and completeness of this manual, but no warranty of
accuracy or reliability is given. All the above specifications and design are subject to change
without notice due to continuous development.
No part of this manual may be copied, reproduced, translated, stored in a retrieval system,
distributed, or transmitted in any form or by any means, electronic or mechanical, for any
purpose without the express written permission of HYT.
This device complies with Part 15 of the FCC rules. Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must except any interference received,
including interference that may cause undesired operation.
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SAFETY TRAINING INFORMATION
Your HYT radio generates RF electromagnetic en-
ergy during transmit mode. This radio is designed
for and classified as “Occupational Use Only”,
meaning it must be used only during the course of
employment by individuals aware of the hazards,
W AR N IN G and the ways to minimize such hazards. This radio
is NOT intended for use by the “General Popula-
tion” in an uncontrolled environment.
This radio has been tested and complies with the FCC RF expo-
sure limits for “Occupational Use Only.” In addition, your HYT radio
complies with the following Standards and Guidelines with regard to
RF energy and electromagnetic energy levels and evaluation of
such levels for exposure to humans:
• FCC OET Bulletin 65 Edition 97-01 Supplement C, Evaluating
Compliance with FCC Guidelines for Human Exposure to Radio
Frequency Electromagnetic Fields.
• American National Standards Institute (C95.1–1992), IEEE Stan-
dard for Safety Levels with Respect to Human Exposure to Radio
Frequency Electromagnetic Fields, 3 kHz to 300 GHz.
• American National Standards Institute (C95.3–1992), IEEE Rec-
ommended Practice for the Measurement of Potential y Hazardous
Electromagnetic Fields— RF and Microwave.
To ensure that your exposure to RF electromag-
netic energy is within the FCC allowable limits for
occupational use, always adhere to the following
C AU TIO N guidelines:
• DO NOT operate the radio without a proper antenna attached, as
this may damage the radio and may also cause you to exceed FCC
RF exposure limits. A proper antenna is the antenna supplied with
this radio by the manufacturer or an antenna speci cally authorized
by the manufacturer for use with this radio.
• DO NOT transmit for more than 50% of total radio use time (“50%
duty cycle”). Transmitting more than 50% of the time can cause
FCC RF exposure compliance requirements to be exceeded. The
radio is transmitting when the “TX indicator” lights red. You can
cause the radio to transmit by pressing the “PTT” switch.
Body-worn operations are restricted to belt-clips, holsters or similar accessories
that have no metallic component in the assembly and that provide at least 1.5
cm separation between the device, including its antenna, and the user's body.
To provide the recipients of your transmission the best
sound quality, hold the antenna at least 5 cm (2 inches) from
mouth, and slightly off to one side.
The information listed above provides the user with the information
needed to make him or her aware of RF exposure, and what to do
to assure that this radio operates within the FCC RF exposure limits of this radio.
Electromagnetic Interference/Compatibility
During transmissions, your HYT radio generates RF energy that
can possibly cause interference with other devices or systems. To
avoid such interference, turn off the radio in areas where signs are
posted to do so. DO NOT operate the transmitter in areas that are
sensitive to electromagnetic radiation such as hospitals, aircraft,
and blasting sites.
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iii
FOREWORD
Thank you for purchasing the TC-620U(2)
transceiver.
READ ALL INSTRUCTIONS carefully and completely before using
the transceiver.
SAVE THIS INSTRUCTION MANUAL–This instruction manual
contains important operating instructions for the transceiver.
INSTALLATION NOTES
• Body-worn operations are restricted to belt-clips, holsters or similar
accessories that have no metallic component in the assembly and
that provide at least 1.5 cm separation between the device, including
its antenna, and the user's body
• If you wear a portable two-way radio on your body, ensure that the
antenna is at least 2.5 centimeters (1 in.) from your body when transmitting.
IMPORTANT
R CAUTION! NEVER hold the transceiver so that the antenna is
very close to, or touching exposed parts of the body, especially the
face or eyes, while transmitting. The transceiver will perform best if
the microphone is 2 to 4 in. (5 to 10 cm) away from the lips and the
transceiver is vertical.
R CAUTION! NEVER operate the transceiver with a headset or
other audio accessories at high volume levels.
R CAUTION! NEVER short the terminals of the battery pack.
DO NOT push the PTT when not actually desiring to transmit.
AVOID using or placing the transceiver in direct sunlight or in areas
with temperatures below +14°F (–10°C) or above +122°F (+50°C).
The basic operations, transmission and reception of the transceiver,
are guaranteed within the specified operating temperature range
(depending on version). However, the LCD display may not be op-
erate correctly, or show an indication in the case of long hours of
operation, or after being placed in extremely cold areas.
DO NOT modify the transceiver for any reason.
KEEP the transceiver from the heavy rain, and Never immerse it in
the water. The transceiver construction is water resistant, not wa-
terproof.
The use of non-HYT battery packs/chargers may impair transceiver
performance and invalidate the warranty.
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